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command-line encryption using the "one-time pad" method

OneTime is an encoder/decoder that uses the one-time pad algorithm.

OneTime is a simple encryption program that takes care of some of
the pad-management bureaucracy for you. It avoids re-using pad
data (except when decrypting the same encrypted message twice, of
course) by maintaining records of pad usage.

If you keep your ~/.onetime configuration area under version control
with Subversion or CVS, OneTime will automatically update it to get the
latest pad usage records before using a pad, and will commit new
records after using a pad. Thus, by sharing a single configuration
area via version control, you and your interlocutors can transparently
avoid the sin of pad range reuse.